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Search: id:A053400
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| A053400 |
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Number of 3-multigraphs on n nodes. |
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+0
7
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| 1, 4, 20, 276, 10688, 1601952, 892341888, 1799786093088, 13042490003160192, 341378170022783017472, 32526326484972756063585792, 11367103329997359707194173746176, 14669222110846093400698801891700529152
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, NY,1973.
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LINKS
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Harald Fripertinger, The cycle type of the induced action on 2-subsets
Vladeta Jovovic, Formulae for the number T(n,k) of n-multigraphs on k nodes
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CROSSREFS
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Cf. A004102. A row of A063841.
Sequence in context: A034235 A000847 A120443 this_sequence A120599 A012797 A054465
Adjacent sequences: A053397 A053398 A053399 this_sequence A053401 A053402 A053403
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KEYWORD
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easy,nonn,nice
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AUTHOR
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Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 06 2000
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